Technical papers are solicited for presentation at the 26th Annual ARRL
and TAPR Digital Communications Conference to be held September 28-30,
2007 in Hartford, Connecticut. These papers will also be published in
the Conference Proceedings (you do NOT need to attend the conference to
have your paper included in the Proceedings). The submission deadline is
July 31, 2007. Please send papers to:
225 Main St
Newington, CT 06111
or you can make your submission via e-mail to: maty(a)arrl.org
Papers will be published exactly as submitted and authors will retain
73 . . . Steve, WB8IMY
I'm getting started in satellite work and interested in purchasing a
suitable HT for portable satellite use using an Arrow antenna. Wondering
what is considered to be an optimum HT especially considering ease of
managing the Doppler shift during a pass. I understand that the HT must be
full duplex capable and thus rules out some models.
Thanks, Gordon, NW7D
Take a look at page 41 of the February 2009 copy of QST. Juan EA4CYQ, and Pedro EB4DKA, have an interesting design for a portable 70cm antenna for LEO satellite work. It's called a "CJU" antenna. I'll let you read the article to find out what it stands for.
It's basically the io half of an IOio antenna. Has anyone had any experience with the IOio? For the homebrewers out there, it's worth taking a look at.
73 de Doug KA8QCU
I found this information on SV2AGW's webside http://www.sv2agw.com.
Serial LoopBack Interface
An Utility that creates a Virtual Serial Port for programs that have no native support for Packet Engine, like Wisp. Author Tim Pearson, KB9VQF.
Dose any one try this software with wisp??
thanks in advance
A good friend of mine is starting satellite activities and he is looking for a VHF and UHF crossed yagi antenna with:
1) circular right and circular left polarization, selectable by relay
2) no more than 4.5 meter boom lenght (obstacle)
3) available in Europe
Strange to say but seems difficult to find nowadays antenna like KLM 2M-14c.
Anybody can tell us, out of list, a store in Europe where we can buy such antenna?
73, Fer IW1DTU
please find a status update of the Delfi-C3 / DO-64 satellite below.
1. Following our earlier reports about the transponder issue, we sadly
have had to conclude that the linear transponder is not operational
anymore. Delfi-C3 / DO-64 has been in basic mode (a mode in which only
housekeeping mode is transmitted) for a number of months in order to
investigate this issue.
Following our extensive tests, we have decided to switch the satellite
back to science mode, which from a mission point of view is the most
useful mode since it yields valuable science data about the Thin Film
Solar Cell payload and the Autonomous Wireless Sun Sensor payload.
2. Today during the 09:33 UTC pass we have successfully commanded the
satellite to science mode using the primary downlink at 145.870MHz,
1200Bd AX.25 BPSK and stored this mode in the on board data base.
Subsequent database dumps indicated that the new settings have been
This mode is recognized by the higher rate of telemetry frames on the
downlink, 3 payload frames are transmitted followed by 1 housekeeping
Note that the satellite boots in this mode on 145.870MHz whenever she
comes out of eclipse (no battery on board). It is possible, that the
satellite decides to use the 145.930 MHz backup downlink. If you hear
Delfi-C3 / DO-64 on this frequency, your reports are highly
3. Contrary to basic mode, in which the downlink is on continuously,
downlink drop outs are likely to occur in science mode. Therefore, it
is possible that the satellite is not heard, and due to the orbit, the
chances that the downlink is still on over VK / ZL are slim, sorry to
all of you down under! However, if you hear the satellite, your
reports are very much appreciated! We regularly post the satellite
status on the Oscar status page at http://oscar.dcarr.org/ and
encourage you to do so as well.
4. Telemetry can be received using the RASCAL program, which is
available at http://www.delfic3.nl/rascal At this moment, the total
amount of frames has exceeded the 500000 mark, more precisely 504364
(which amounts to approx. 72.14 MB), a truly magnificent number.
Thanks once again to all of you receiving and submitting telemetry!
When in science mode, the IV curves of the Thin Film Solar Cell
payload can be viewed by clicking "options" --> "show IV curves".
Best 73 on behalf of the Delfi-C3 / DO-64 team,
Wouter Jan Ubbels PE4WJ